Asked by Sarah

If you weigh out 2.083 g Fe(NO3)3·9H2O, what is the final concentration of the dilute Fe(NO3)3 solution that you make?
Answered by DrBob222
How much water did you add? How many dilutions did you make?
Answered by Sarah
we did 1 dilution and do you need to know how much water is added? I attempted the problem and the hint that was given said..."use the mass of iron nitrate and the volume of your final solution to determine the concentration of the final solution."
Answered by Sarah
we needed to make the solution's concentration about 0.002 M.
Answered by DrBob222
Yes, the final volume of the solution is needed.
Convert 2.083g Fe(NO3)3.9H2O to mols. That's mols = grams/molar mass.
Then mols Fe(NO)3)3 is the same as mols of the stating material.
Finally, mols/L = M.
Answered by Sarah
do you know what the molar mass is?
Answered by Sarah
is it 404?
Answered by Sarah
nevermind dr. bob i figured it out.. the volume was 25 mL
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